<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoleDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag closable @close="removeRightById(scope.row,item2.id)" type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>
                            {{scope.row}}
                        </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                       <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                       <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                       <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key='id' default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="alltoRights">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 添加角色的对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%" @close="addRoleDialogClosed">
            <!-- 添加分类的表单 -->
            <el-form :model="addRoleForm" label-width="100px" :rules="addRoleFormRules" ref="addRoleFormRef">
                <el-form-item label="角色名称：" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述：" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改角色的对话框 -->
        <el-dialog title="修改角色" :visible.sync="editRoleDialogVisible" width="50%" @close="editRoleDialogClosed">
            <!-- 修改角色的表单 -->
            <el-form :model="editRoleForm" label-width="100px" :rules="editRoleFormRules" ref="editRoleFormRef">
                <el-form-item label="角色名称：" prop="roleName">
                    <el-input v-model="editRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述：" prop="roleDesc">
                    <el-input v-model="editRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRole">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return {
            // 所有角色列表数据
            rolelist:[],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            // 所有权限的数据
            rightslist:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点Id值数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId:'',
            // 控制添加角色对话框的显示与隐藏
            addRoleDialogVisible:false,
            // 添加角色表单
            addRoleForm:{
                roleName :'',
                roleDesc :'',
            },
            // 添加角色表单验证规则对象
            addRoleFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名称',trigger: 'blur'},
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',trigger: 'blur'},
                ]
            },
            // 编辑角色表单
            editRoleForm:{},
            // 控制编辑角色对话框的显示与隐藏
            editRoleDialogVisible:false,
            // 编辑角色表单验证规则对象
            editRoleFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名称',trigger: 'blur'},
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',trigger: 'blur'},
                ]
            },
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        // 获取所有角色的列表
        async getRolesList(){
            const {data:res}=await this.$http.get('roles')
            if(res.meta.status!==200){
                return this.$message.error('获取角色列表失败！')
            }
            this.rolelist=res.data
            // console.log(this.rolelist)
        },
        // 根据Id删除对应的权限
        async removeRightById(role,rightId){
            // 弹框提示用户是否要删除
            const confirmResult=await this.$confirm(
                '此操作将永久删除该权限, 是否继续?',
                '提示',
                {
                    confirmButtonText:'确定',
                    cancleButtonText:'取消',
                    type:'warning'
                }
            ).catch(err=>err)
            if(confirmResult!=='confirm'){
                return this.$message.info('取消了删除！')
            }
            // this.$message.success('删除！')
            const {data:res}=await this.$http.delete(
                `roles/${role.id}/rights/${rightId}`
            )
            if(res.meta.status!==200){
                return this.$message.error('删除权限失败！')
            }
            // console.log(res)
            role.children=res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId=role.id
            // 获取所有权限的数据
            const {data:res}=await this.$http.get('rights/tree')
            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败！')
            }
            // 把获取到的权限数据保存到 data 中
            this.rightslist=res.data
            // console.log(this.rightslist)
            // 递归获取三级节点的Id
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible=true
        },
        getLeafKeys(node,arr){
            // 如果当前 node 节点不包含 children 属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>this.getLeafKeys(item,arr))
        },
        // 点击为角色分配权限
        async alltoRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys)
            const idStr=keys.join(',')
            const {data:res}=await this.$http.post(
                `roles/${this.roleId}/rights`,{rids:idStr}
            )
            if(res.meta.status!==200){
                return this.$message.error('分配权限失败！')
            }
            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible=false
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys=[]
        },
        // 监听添加角色对话框的关闭事件
        addRoleDialogClosed(){
            this.$refs.addRoleFormRef.resetFields()
        },
        // 点击添加角色
        addRole(){
            this.$refs.addRoleFormRef.validate(async valid=>{
                if(!valid) return
                const {data:res}=await this.$http.post('roles',this.addRoleForm)
                if(res.meta.status!==201){
                    return this.$message.error('添加角色失败！')
                }
                this.$message.success('添加角色成功！')
                this.getRolesList()
                this.addRoleDialogVisible=false
            })
        },
        // 展示编辑角色的对话框
        async showEditDialog(id){
            // console.log(id)
            const {data:res}=await this.$http.get('roles/'+id)
            if(res.meta.status!==200){
                return this.$message.error('获取角色失败')
            }
            // console.log(res)
            this.editRoleForm=res.data
            // console.log(this.editRoleForm)
            this.editRoleDialogVisible=true
        },
        // 监听编辑角色对话框的关闭事件
        editRoleDialogClosed(){
            this.$refs.editRoleFormRef.resetFields()
        },
        // 点击修改角色
        editRole(){
            this.$refs.editRoleFormRef.validate(async valid=>{
                if(!valid) return
                const {data:res}=await this.$http.put('roles/'+this.editRoleForm.roleId,
                {
                    roleName :this.editRoleForm.roleName,
                    roleDesc :this.editRoleForm.roleDesc,
                })
                if(res.meta.status!==200){
                    return this.$message.error('修改角色失败！')
                }
                this.$message.success('修改角色成功！')
                this.getRolesList()
                this.editRoleDialogVisible=false
            })
        },
        // 删除角色
        async removeRoleById(id){
            const confirmResult=await this.$confirm(
               '此操作将永久删除该角色, 是否继续?',
                '提示',
                {
                    confirmButtonText:'确定',
                    cancelButtonText:'取消',
                    type:'warning'
                }
            ).catch(err=>err)
            // 用户取消了删除的操作
            if(confirmResult!=='confirm'){
                return this.$message.info('已取消删除！')
            }
            const{data:res}=await this.$http.delete('roles/'+id)
            if(res.meta.status!==200){
                return this.$message.error('删除角色失败！')
            }
            this.$message.success('删除角色成功！')
            this.getRolesList()
        }
    }
}
</script>
<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>